Contemplating the infinite is a time-tested way to shrink the present down to size. But if you think about it for very long, infinity can really mess with your mind. There’s something fundamentally paradoxical about it, and beautiful. Deep Time is a series all about the natural ecologies of time from To The Best Of Our Knowledge and the Center for Humans and Nature. We'll explore life beyond the clock, develop habits of "timefulness" and learn how to live with greater awareness of the many types of time in our lives. Original Air Date: June 07, 2025 Interviews In This Hour: The glorious mathematics of infinity — Checking into the infinity hotel — Finding solace in the nature of space-time — The math and mysticism of Albert Einstein Guests: Jordan Ellenberg, Jon Halperin, Michelle Thaller, Kieran Fox Never want to miss an episode? Subscribe to the podcast. Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.

Some artists work with pen and ink, some use brushes and paint. And some make art out of time. Meet some contemporary artists who are finding new ways to bridge the distance between us and the furthest reaches of time. Deep Time is a series all about the natural ecologies of time from To The Best Of Our Knowledge and the Center for Humans and Nature. We'll explore life beyond the clock, develop habits of "timefulness" and learn how to live with greater awareness of the many types of time in our lives. Original Air Date: February 15, 2025 Interviews In This Hour: Crafting cosmic art through deep time — What if clocks were synced to the flow of a river? — Capturing a symphony of time in a dawn chorus Guests: Katie Paterson, Jonathon Keats, Alex Braidwood Never want to miss an episode? Subscribe to the podcast. Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.

The longest nights of the year are here, but how many of us will see them? The global spread of light pollution is making it harder to experience dark skies and natural darkness. Learning how to reconnect with the planet’s ancient nocturnal rhythms can be profoundly restorative. Nature writers and darkness activists tell us what we’re missing. Deep Time is a series all about the natural ecologies of time from To The Best Of Our Knowledge and the Center for Humans and Nature. We'll explore life beyond the clock, develop habits of "timefulness" and learn how to live with greater awareness of the many types of time in our lives. Original Air Date: December 21, 2024 Interviews In This Hour: Listening to the song of the night — Adjusting our eyes to wonders of the nocturnal world Guests: Sam Lee, Leigh Ann Henion Never want to miss an episode? Subscribe to the podcast. Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.

Our lives are so rushed, so busy. Always on the clock. Counting the hours, minutes, seconds. Have you ever stopped to wonder: what are you counting? What is this thing, that’s all around us, invisible, inescapable, always running out? What is time? Original Air Date: November 18, 2023 Interviews In This Hour: Time, loss and the Big Bang — Finding solace in the vastness of space — Carlo Rovelli's white holes, where time dissolves Guests: Marcelo Gleiser, Marjolijn van Heemstra, Carlo Rovelli Check out the full series at ttbook.org/deeptime

Are you ready to think in centuries instead of seconds? Eons instead of hours? It’s time to make thousand-year plans and appreciate how Earth keeps time. For more from this series, visit ttbook.org/deeptime. Original Air Date: August 19, 2023 Interviews In This Hour: Shifting your mind to 'geologic' time — Discovering the wonders of ancient cave art — Making art inspired by the ancestors Guests: Marcia Bjornerud, Stephen Alvarez, Dustin Illetewahke Mater Never want to miss an episode? Subscribe to the podcast. Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.

When you’re on the clock, you’re always running out of time – because in our culture, time is money. The relentless countdown is making us and the planet sick. But clock time isn’t the only kind. There are older, deeper rhythms of time that sustain life. What would it be like to live more in tune with nature’s clocks? **Deep Time is a series all about the natural ecologies of time from To The Best Of Our Knowledge and the Center for Humans and Nature. We'll explore life beyond the clock, develop habits of "timefulness" and learn how to live with greater awareness of the many types of time in our lives. Original Air Date: June 03, 2023 Interviews In This Hour: How time came to rule our lives — and how we might free ourselves — The past and future of keeping time Guests: Jenny Odell, David Rooney Never want to miss an episode? Subscribe to the podcast. Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.

Time rules our lives. We wake, eat, work, and sleep on the clock. Our days unfold in a standardized symphony of alarm clocks, school buzzers, and meeting timers. Meanwhile, global positioning satellites measure time in millionths of seconds, and financial trades circle the planet at the speed of light. Time-keeping is among the greatest accomplishments of the human species – but somewhere along the way, we made a fundamental miscalculation: we began to mistake our clocks for time itself. Deep Time is a new series all about the natural ecologies of time from To The Best Of Our Knowledge and theCenter for Humans and Nature — with support from the Kalliopeia Foundation. In Deep Time, TTBOOK will explore biological time, geological time, cosmic time, ancestral time. We’ll imagine time as a spiral, a loop, and also as an eternal present – as we learn to live beyond the clock. Learn more about the series at ttbook.org/deeptime

Ethnobotanist Gary Paul Nabhan has been called the “father of the local food movement.” For decades he’s campaigned for seed diversity and sustainable food production. Some of his insights come from the farming practices of Indigenous people living near the U.S.-Mexico border, who’ve grown food in arid habitats for centuries. Originally from the Midwest, Nabhan moved to the Arizona desert several decades ago. He reflects on “the wisdom of the desert,” and also talks about his work to foster a “radical center” where ranchers and environmentalists can come together to find common ground. Human identity cannot be separated from our nonhuman kin. From forest ecology to the human microbiome, emerging research suggests that being human is a complicated journey made possible only by the good graces of our many companions. In partnership with the Center for Humans and Nature and with support from the Kalliopeia Foundation, To The Best Of Our Knowledge is exploring this theme of "kinship" in a special radio series. To learn more about the Kinship series, head to ttbook.org/kinship. Original Air Date: April 15, 2022 Guests:  Gary Paul Nabhan

The fungal world is mind-bending. Mushrooms may look like plants, but taxonomically, fungi are more closely related to animals. They go inside their food to eat it and “play games with individuality,” says biologist Merlin Sheldrake, author of “Entangled Life.” One underground fungal network in Oregon spreads over four square miles, but genetically, it’s a single organism. As Sheldrake says, “they are everywhere at once and nowhere in particular.” He talks with Steve Paulson about his lifelong fascination with fungi, his experiments with ancient recipes for fermented alcohol, and the maverick Stoned Ape Theory, which claims that magic mushrooms sparked the evolution of human consciousness. Human identity cannot be separated from our nonhuman kin. From forest ecology to the human microbiome, emerging research suggests that being human is a complicated journey made possible only by the good graces of our many companions. In partnership with the Center for Humans and Nature and with support from the Kalliopeia Foundation, To The Best Of Our Knowledge is exploring this theme of "kinship" in a special radio series. To learn more about the Kinship series, head to ttbook.org/kinship. Original Air Date: April 08, 2022 Guests: Merlin Sheldrake

Thirty years ago, forest ecologist Suzanne Simard was a lone voice in the wilderness, arguing that commercial logging practices were destroying the symbiotic relationships between different tree species. She showed how mycorrhizal networks fused with tree roots to create complex systems of communication and cooperation. Today, Simard is a celebrated scientist. Her concept of “mother trees” helped inspire James Cameron’s blockbuster movie "Avatar," and she was a model for one character in Richard Powers’ Pulitzer Prize-winning novel “The Overstory.” In this interview, she reflects on her childhood growing up in a Canadian logging family, her pioneering insights about “forest intelligence,” and why she talks to trees. Human identity cannot be separated from our nonhuman kin. From forest ecology to the human microbiome, emerging research suggests that being human is a complicated journey made possible only by the good graces of our many companions. In partnership with the Center for Humans and Nature and with support from the Kalliopeia Foundation, To The Best Of Our Knowledge is exploring this theme of "kinship" in a special radio series. To learn more about the Kinship series, head to ttbook.org/kinship. Original Air Date: April 01, 2022

Anthropologist Enrique Salmon formulated the concept of “kincentricity,” a worldview that sees everything around us — plants, animals, rocks, wind — as our direct relative. As Salmon says, “the rain is us, and we are the rain.” In his native Raramuri culture, culture and language are embedded in the mountain landscape of Chihauhau, Mexico. Salmon teaches a class called “American Indian Science,” in which he asks his students to incorporate their personal experiences into their observations about the world. He tells Steve Paulson that any theory of reality must account for lived experience, which pushes against the scientific paradigm that seeks an “objective” understanding of reality. Human identity cannot be separated from our nonhuman kin. From forest ecology to the human microbiome, emerging research suggests that being human is a complicated journey made possible only by the good graces of our many companions. In partnership with the Center for Humans and Nature and with support from the Kalliopeia Foundation, To The Best Of Our Knowledge is exploring this theme of "kinship" in a special radio series. To learn more about the Kinship series, head to ttbook.org/kinship. Original Air Date: March 25, 2022 Guests: Enrique Salmon Further Reading: CHN: "I Want the Earth to Know Me as a Friend" Never want to miss an episode? Subscribe to the podcast. Want to hear more from us, including extended interviews and favorites from the archive? Subscribe to our newsletter.

There are old folktales and legends of people who can become animals. Animals who can become people. And there’s a lesson for our own time in those shapeshifting stories — a recognition that the membrane between what's human and more-than-human is razor thin. Human identity cannot be separated from our nonhuman kin. From forest ecology to the human microbiome, emerging research suggests that being human is a complicated journey made possible only by the good graces of our many companions. In partnership with the Center for Humans and Nature and with support from the Kalliopeia Foundation, To The Best Of Our Knowledge is exploring this theme of "kinship" in a special radio series. To learn more about the Kinship series, head to ttbook.org/kinship. Original Air Date: November 20, 2021 Guests: Sharon Blackie — David Abram — Chris Gosden — Stephen Graham Jones Interviews In This Hour: Reclaiming the fierce women who are shapeshifters — How a man turned into a raven — Shapeshifters, shamans and the 'New Animism' — Horror author Stephen Graham Jones on what our monsters say about us

If you look at a mountain, you might see a skiing destination, a climbing challenge, or even a source of timber to be logged or ore to be mined. But there was a time when mountains were sacred. In some places, they still are. What changes when you think of a mountain not as a giant accumulation of natural resources, but as a living being? Human identity cannot be separated from our nonhuman kin. From forest ecology to the human microbiome, emerging research suggests that being human is a complicated journey made possible only by the good graces of our many companions. In partnership with the Center for Humans and Nature and with support from the Kalliopeia Foundation, To The Best Of Our Knowledge is exploring this theme of "kinship" in a special radio series. To learn more about the Kinship series, head to ttbook.org/kinship. Original Air Date: July 24, 2021 Guests:  John Hausdoerffer — Regina Lopez-Whiteskunk — David Hinton — Lisa Maria Madera Interviews In This Hour:  What Do You Owe The Mountains Around You? — 'These Are Live, Active Places': A Ute Activist Fights To Save The Bears Ears National Monument — A Poet Finds Life Lessons on Hunger Mountain — 'I Was Born To Volcanoes'

Over the past decade, plant scientists have quietly transformed the way we think of trees, forests and plants. They discovered that trees communicate through vast underground networks, that plants learn and remember. If plants are intelligent beings, how should we relate to them? Do they have a place in our moral universe? Should they have rights? Human identity cannot be separated from our nonhuman kin. From forest ecology to the human microbiome, emerging research suggests that being human is a complicated journey made possible only by the good graces of our many companions. In partnership with the Center for Humans and Nature and with support from the Kalliopeia Foundation, To The Best Of Our Knowledge is exploring this theme of "kinship" in a special radio series. To learn more about the Kinship series, head to ttbook.org/kinship. Original Air Date: December 19, 2020 Guests: Robin Wall Kimmerer — Matt Hall — Monica Gagliano — Brooke Hecht Interviews In This Hour: We've Forgotten How To Listen To Plants — We Share This World With Plants. What Do We Owe Them? — Guided by Plant Voices — The Botanical Medicine Cabinet

There's a certain a kind of visual encounter that can be life changing: A cross-species gaze. The experience of looking directly into the eyes of an animal in the wild, and seeing it look back. It happens more often than you’d think and it can be so profound, there’s a name for it: eye-to-eye epiphany. So what happens when someone with feathers or fur and claws looks back? How does it change people, and what can it teach us? Human identity cannot be separated from our nonhuman kin. From forest ecology to the human microbiome, emerging research suggests that being human is a complicated journey made possible only by the good graces of our many companions. In partnership with the Center for Humans and Nature and with support from the Kalliopeia Foundation, To The Best Of Our Knowledge is exploring this theme of "kinship" in a special radio series. To learn more about the Kinship series, head to ttbook.org/kinship. Original Air Date: February 08, 2020 Guests:  Gavin Van Horn — Jenny Kendler — Ivan Schwab — Jane Goodall — Alan Lightman Interviews In This Hour:  In The Eye Of The Osprey: A Physicist's Wild Epiphany — 100 Bird Eyes Are Watching You — The Look That Changed Primatology — Watching the Fierce Green Fire Die: Animal Gazes That Shaped Conservation Movements — The 600 Million Year History Of The Eye — 'We Are The Feast' — A Feminist Philosopher's Life-Changing Encounter With A Crocodile — How Do You Practice Kinship? A Brief Meditation — Sharing Eye-To-Eye Epiphanies With The Animal World  Further Reading: "The Disruptive Eye" by Gavin Van Horn—"6 a.m. on LaSalle Street" by Katherine Cummings—"Salmon Speak ~ Why Not Earth?" by Bron Taylor—"The Eyes of an Owl" by Greg Ripley—"From Bestiary" by Elise Paschen

When you think about your neighbors, your friends and family, do you consider the nonhuman relationships in your life? With the birds and trees, the rivers and hills around you? This idea of "kinship" with our plant and animal neighbors — and the broader ecosystem around us — is the focus of "Kinship With The More Than Human World," an eight-part podcast and radio series produced by TTBOOK in partnership with the Center for Humans and Nature and with support from the Kalliopeia Foundation. In this series, leading scientists, philosophers and writers illuminate ways in which “personhood” transcends the human species and shows how kinship practices can deepen our care and respect for the more-than-human world. You can learn more about the series at TTBOOK.org/kinship